Ford Fuel System :: 1971 F250 - Gas Leaking - A Lot Of Crank To Start - Rebuild?
Mar 20, 2008
I have a 1971 F250 automatic with original stock 360 engine (100k miles). It currently has an Autolite 2100 2bbl carb.
The Autolite is leaking gas out somewhere where I can't see the leak. It takes a lot of cranking for it to start after sitting 10 minutes and my wife won't drive it for fear of being stranded. My attempt at a rebuild must have failed... Also have issues with anti-stall dashpot spring coming off while driving. When the spring and plunger come off I have to hold the gas on a little to keep from stalling while stopped at a light. A couple other parts looked like they needed repair during the rebuilt, but the kit didn't have any replacement (vacuum diaphragm torn). Also, after replacing plugs, plug wires, replacing points with Pertronix Ignitor 2, a new rotor, and distributor cap, it still doesn't hold a steady idle. In fact it is hard to get it down to the spec idle for an automatic without fear of stalling.
To make a long story short, what is a low maintenance 2bbl (new, not rebuilt) replacement carb. The truck needs to be dependably started by my wife for garage sale runs and home depot trips. I could switch to a 4 bbl intake, but would rather wait for another 50k miles and switch the engine over to a rebuild 390 with nicer intake and carb.
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A cold engine crank will turnover and start normally. But stop to run and errand or grab lunch...and the warm 302 2 barrel engine will turn over very sluggishly, lke the battery is dying. If you wait until the engine is cool, an easy start is assured but that takes hours! A local repair shop has rebuilt the carb, the battery & cables are new, and the starter works fine when engine is cold. My local repair shop is out of suggestions. It seems to work a little to hold the gas pedal down on the floor for a warm engine start....but engine still turns over sluggishly when trying to start when warm. Now If I drive it.....I just drive it around town a bit then back home ...unless I stay several hours somewhere while the engine cools....but that's not fun. It is a convertible, fun to drive...and this problem needs to be solved.
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My 01 super crew (4.6 liter) doesn't start. It sits in the driveway for weeks at a time, has 140k and has the orginial fuel filter. Before when this has happened, continuous cranking finally got it fired up. Could a dirty filter be the problem? This truck is 100% reliable so I'm really surprised. Looking at other posts, I see it only requires a special tool to replace. Is this so?
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I just had a former Ford tech rebuild my motorcraft 2150 2v on my '77 F250. I took it home, put it back on the truck and it ran kind of rough. I then went ahead and screwed both idle mix screws in untill seated, then back out two turns. The truck ran great, turned off truck then when it the house for dinner. Half an hour later I come back out...truck will not start, just sits and cranks. Finally got it started and it ran good, but crapped out after it warmed up. I have made sure there were no vac leaks when truck was running the first time. Did I adjust the mixture right?
The truck is a '77 F250 400/C6
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Had to do the icp sensor originally. went in from the top and discovered my oil cooler was failing too. so i did that. with weather (too tall to fit in the garage) and life getting in the way it's taking me 2 months a little here n there to actually get it done so she's sat for a while. yesterday was moment of truth to get it started again. the batts were old before i started working on it. so i replaced those yesterday.
I've tried and tried to get it to start and it won't turn over. it did for one tenth of a second try. nothing since. I saw that my shifter wasn't exactly in park so i wiggled it and tried to crank it again and now it won't even crank. I have a feeling somehow the transmission isn't reading in park or neutral so it's refusing to crank. I really don't want to tow it.
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My truck will be running real good then all at once start missing so bad it shakes gear shifter,spits and pops and then goes back to running fine.
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I've had a fuel leak near the pump of my 79 F150 with a 400 for some time. I didn't know exactly where it was coiming from, but fuel was being sprayed on to the oil filter from something near the pump. I assumed it was the steel line, and that it had rusted through or cracked, and was going to replace it when I had a chance. I was poking around today though, and realized that the fuel was not leaking from the line, but from a hole in the side of the mechanical pump.
For someone who knows what these pumps look like, there is a horizontal cylindrical bump out near the top of the pump, on the side of the pump that is away from the engine. The fuel is spraying in a mist out of one side of that. To me, it always seemed to be a screw channel, but I didn't think the pump was 2 halves put together? Need to know more about my pump, what that bumped out section is, or why/how fuel could be spraying out of it.
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1990 f150
I have a leak in my rear fuel tank, the front tank has been blocked off and is not used, The leak is at the seam of the two part tank, once removed is there a way to seal this? or should I just replace it?
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I got a 71 f-250 ranger n it's a beast with a few problems. The most resent is emissions. I have owned it for a year and guy bought it from knows about timing n carbs, but now days most mechanics hate dealing with carbs from what I've found. I'm in az and my emissions came out as a fail, but from what I've read it may be fixable with the right knowledge if any ones willing to share. Here we're my result
Loaded reading. Load standard. Idle read. Idle standard.
Hc. 131. 450. 609. 450
Co. 5.56. 3.75. .11. 5 .0
So it failed idle hc and loaded carbon. So I'm pretty sure my trucks running rich and I know I can adjust its air and fuel, just not tremendously experienced.
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I just bought another 1991 Ford. This one is a 1/2 ton XLT Lariet with the 302 and for the first time I own a short bed. I also have a 1991 F-250 XLT with a 460 and a 8' bed.
Here is the problem, ( I think) it will not run or at least not for long. The fuel pump, which I am guessing is in the rear tank will not stop running. On the F-250 the pump stops running after a few seconds after I turn on the key.
Where should I start to find out my problem with the fuel system?
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My F250 heavy duty isnt getting voltage to the fuel pump relay.....
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I have a 94 F250 5.8 liter with 96K miles. Can I remove the fuel rail and clean or replace the filter that is placed at the top of the fuel injector?
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I have a 1988 Ford F-250 Lariat, 7.5L 460, four-wheel drive. I have two fuel tanks on it, and I've been having a really annoying, obnoxious problem with it lately. After running it for a while, I noticed that I keep losing fuel pressure, and the truck stalls. When I try to start it, it does nothing but roll over. It just won't start. I've changed the fuel filter, I know both fuel pumps are working (I turn over the key, I can hear front, back, and high pressure pump attached to the left side frame rail kick in.) It's Fuel Injected, not EFI, hence that third pump. The problem happens a lot, and it's random. I could drive for 100 miles, stop to get something to eat, come out, and it won't start.
I thought maybe it was the fuel pressure regulator, but I don't think that's the case because it still runs. I would assume that if the regulator was bad, it wouldn't run at all. I also thought that maybe it was the relay, but according to some mechanics I spoke too, if I can hear the pumps kick in when I turn the key over, then the relay is fine. The only thing I could think of is that it might be the fuel selector switch. Maybe it's going bad, shorting out or something. When I flip the switch though, it switches between fuel tanks, and the gauge reads how much fuel is in it from the sending unit.
There's a schrader-type valve up by the fuel injectors. When I push it in, it barely squirts any fuel out, if at all, so I know the pressure is low. When I push it in on a good day, it sprays out like a water fountain. Just tried starting it again - no good. Pushed on the valve, it spurted out some fuel pretty well, but still won't start. Occasionally tries to, but ultimately won't. I know the spark is good, checked the plugs/distributor cap. Can't get the sucker to start.
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I have a 77 f-250 with a 460 engine and a 4bbl Motorcraft carb and its leaking a substantial amount of fuel out of the newly replaced filter that is attached to the carburetor. The fitting is tight and I even tried buying some small gaskets to seat it, but that didn't work either.
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I am a newbie as far as fuel injection. The original issue the truck had was no fuel. I tracked down the issues to a blown fuel pump relay and a melted inertia switch. I jumped the inertia wires with a new fuel pump relay installed and the truck ran at an idle and up to 3500 RPM when stationary. If the truck is going up a grade or needs more throttle it will start to lose fuel pressure and end up stalling. I had the fuel pressure gauge connected to the schrader valve on the fuel rail and had 30-35 PSI when idling. It runs good under light load on the throttle.
Under heavy load it starts to drop quickly and if you back off the throttle it will stay running some times. I changed the fuel filter and also replaced the high pressure pump on the main frame and it still has the same problems.The original pump was pumping about 13 ounces of fuel in the 20 second test that the repair manual suggested. I have even placed a jumper wire direct to the new fuel pump to bypass original wiring and possible problems. When it stalls under load (No Fuel pressure) at the schrader valve you can hear the fuel pump running but there is no fuel pressure.
If I turn off the ignition for a few minutes and then turn the key back to the on position it will start to pressurize and then start and run at an idle. I even replace the ignition switch as it was a little temperamental. I have not changed or checked the fuel pressure regulator as it is a pain to get to at the back of the engine. I do not want to spend a fortune tracking down this problem since the truck may not even pass its smog inspection and may be a parts truck only.
67 F-250 4x4
73 Crew 4x2 (4x4 Soon)
89 F-250 Super Cab 4x4
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I've got a 390 with a 2 barrel intake and a holley model 0-4778 carb...The carb is 6 months old....
Here's the full story...my gas gauge just stopped functioning last week...so I ran out of gas... since then things have been going down hill...
I've searched all the forums and checked the fuel pressure by putting a pressure gauge right before the carb, its reading a steady 6 psi so I don't think the fuel pump is the culprit...
The carb started leaking gas into the crankcase..I checked the float level, cleaned out the needle, and replaced the power valve in the carb...then drained the crap oil/gas and put in a new oil filter and oil...
Then started her up for 2 minutes and she does it again....all kinds of gas in the oil... I've gone thru this about 3 or 4 times now and I've spent so much $$ on oil and oil filters trying to figure this bitch out...
I am now going to tear the entire carb apart and soak it in carb cleaner and if this doesn't work I'm switching over and buying a new Edelbrock...
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I have a 71 F250 4x4 with the 435 and recently had the tranny out to replace the output shaft i believe its called, and other than the shaft it seemed all was well. Shortly thereafter it became impossible to shift it into 4th gear without it grinding. I am able to minimize it by double clutching and keeping the rpms right, but the grind is unavoidable and its only 4th gear, all others shift fine. I was hoping there was a way to adjust the clutch but if not am i going to have to pull it back out and look at the fork and gears? But like i said, we just had it out and the fork and gears seemed fine.
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I own a 1971 Ford F-250 Custom with the 4 Speed Synchronized Warner T-18 transmission. When I put in the clutch, once it engages, it makes a very loud whirring noise. I'm not concerned about the noise as much as possible issues with the transmission itself.
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I have gas leaking from the pump diaphragm assembly cover of the motorcraft carb,2BBL,360,75,auto.Is this easily repairable,or is a new carb in my future?
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I have a unique problem with my newly acquired 71 F250. The left brake does illuminate when the brake is pressed but when the right turn signal if activated the left brake light does come on. The left flasher light also does not work. All other rear ligh function are normal. I am assuming I have a short or a wiring issue just wanted to know if there was any common item that might be know about this topic. The bulbs are all new. The reverse lights do not work either but pretty for sure its unrelated.
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I have an 86 F150 that is idling rough. It used to cut out on me until I replaced the fuel pressure regulator. I have read in other posts that the problem for my rough idle could be leaking injectors. When I replaced the regulator I found a bad injector. My question is that if I check my fuel pressure, with the new regulator, would the only way I would lose pressure be that my injectors are leaking?
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